<?php

/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Log
 * @subpackage Writer
 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: ZendMonitor.php 23351 2010-11-16 18:09:45Z matthew $
 */
/**
 * Zend_Log_Writer_Abstract
 */
// require_once 'Zend/Log/Writer/Abstract.php';
/**
 *
 * @category Zend
 * @package Zend_Log
 * @subpackage Writer
 * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: ZendMonitor.php 23351 2010-11-16 18:09:45Z matthew $
 */
class Zend_Log_Writer_ZendMonitor extends Zend_Log_Writer_Abstract {

    /**
     * Is Zend Monitor enabled?
     * @var bool
     */
    protected $_isEnabled = true;

    /**
     * Is this for a Zend Server intance?
     * @var bool
     */
    protected $_isZendServer = false;

    /**
     *
     * @throws Zend_Log_Exception if Zend Monitor extension not present
     */
    public function __construct () {
        if ( ! function_exists ('monitor_custom_event')) {
            $this -> _isEnabled = false;
        }
        if (function_exists ('zend_monitor_custom_event')) {
            $this -> _isZendServer = true;
        }
    }

    /**
     * Create a new instance of Zend_Log_Writer_ZendMonitor
     * @param array|Zend_Config $config
     * @return Zend_Log_Writer_Syslog
     * @throws Zend_Log_Exception
     */
    static public function factory ($config) {
        return new self ();
    }

    /**
     * Is logging to this writer enabled?
     * If the Zend Monitor extension is not enabled, this log writer will
     * fail silently.
     * You can query this method to determine if the log
     * writer is enabled.
     * @return bool
     */
    public function isEnabled () {
        return $this -> _isEnabled;
    }

    /**
     * Log a message to this writer.
     * @param array $event log data event
     * @return void
     */
    public function write ($event) {
        if ( ! $this -> isEnabled ()) {
            return;
        }
        parent::write ($event);
    }

    /**
     * Write a message to the log.
     * @param array $event log data event
     * @return void
     */
    protected function _write ($event) {
        $priority = $event['priority'];
        $message = $event['message'];
        unset ($event['priority'], $event['message']);
        if ( ! empty ($event)) {
            if ($this -> _isZendServer) {
                // On Zend Server; third argument should be the event
                zend_monitor_custom_event ($priority, $message, $event);
            } else {
                // On Zend Platform; third argument is severity -- either
                // 0 or 1 -- and fourth is optional (event)
                // Severity is either 0 (normal) or 1 (severe); classifying
                // notice, info, and debug as "normal", and all others as
                // "severe"
                monitor_custom_event ($priority, $message, ($priority > 4) ? 0 : 1, $event);
            }
        } else {
            monitor_custom_event ($priority, $message);
        }
    }

}
